Combined pipe fitting and air conditioning system pipeline

Abstract

A combined pipe fitting and an air conditioning system pipeline. The combined pipe fitting includes a first, a second, and a third pipe fitting. Both the first and the second pipe fittings are stainless steel pipes, and a first end of the second pipe fitting is connected to the first pipe fitting. The third pipe fitting is a copper pipe and includes a first connecting section, an effective section, and a second connecting section. The first connecting section is sleeved with a second end of the second pipe fitting. A length of the effective section L is an axial extension distance on the third pipe fitting from an end face of the second end of the second pipe fitting to a direction away from the first pipe fitting. A fatigue life N of the combined pipe fitting is inversely proportional to √{square root over (L)}, and 1 mm≤L≤35 mm.

Dependencies are inferred from the claim text.